Update on the Sprint OEM hard case...
After using it for 2 weeks now I can honestly say that is is worth buying. I bought the same OEM hard case for my TP2 and I returned it in 2 days because it was impossible to remove. This one has no such problem. The back cover is very simple to remove and I don't have that "am I going to break one of the tabs off this time?" feeling when I open it. Once its on it is very secure and the rubberized exterior keeps it from sliding around the center arm rest of my truck while I am driving.
Good construction, good functionality, and it looks nice too.
And just in case you don't want to drive down to the Sprint store, here is the link to buy one online:
Sprint - All Accessories